14.Things to Try ( type as seen at the MATLAB prompt >>)

    sqrt(-1)
    x = [-1 0 2]
    x = x'
    y = x - 1
    inprod = x'*y
    outprod = x*y'
    who
    A = [1 2 3; 4 5 6; 7 8 0]
    B = A'            
    B(1,1)
    B(:,1)
    B(1:2,:)
    x(3)
    C = A + B
    b = A*x
    x = inv(A)*b
    z = pi*x
    who
    w = x*y
    w = x.*y
    u = x^2
    u = x.^2

    z = cos(pi/3)
    z = [-1:0.05:1]'
    zz = cos(2*pi*z)
    plot(z,zz)
    plot(z,zz,z,zz,'ro')
    zz = exp(-1.5*z).*cos(2*pi*z)
    plot(z,zz,z,zz,'ro')
    title(`Figure 1'); xlabel(`Time'); ylabel(`Amplitude'); grid 

    (create a file called bumps.m in your root directory.
     It should include:)
    function y = bumps(x)
    y = 1./((x-.3).^2+.01) + 1./((x-.9).^2+.04) - 6

    (then at the prompt >>)
    x = -1:0.01:2;
    plot(x,bumps(x))
    fplot(`bumps',[-1 2],0.01)

    x=-8:0.5:8;
    y = x;
    [X,Y]=meshgrid(x,y)
    plot(X,Y,'.')
    R = sqrt(X.^2 + Y.^2) +eps
    Z = sin(R)./R
    contour(x,y,Z,10)
    mesh(x,y,Z)
    meshc(x,y,Z)

15.MATLAB Command and Function Tables 

    The 20 categories listed below provide command and function reference
    tables for their associated topic. To find "general" commands and
    functions for MATLAB, at the MATLAB prompt ">>", enter: 

            help general

    To find MATLAB operators and special characters, at the MATLAB
    prompt ">>", enter: 

            help ops

    Category   Description
    --------   ------------------------------------------------
    general    General purpose commands
    ops        Operators and special characters
    lang       Language constructs and debugging
    elmat      Elementary matricies and matrix manipulation
    specmat    Specialized matricies
    elfun      Elementary math functions
    specfun    Specialized math functions
    matfun     Matrix functions - numerical linear algebra
    datafun    Data analysis and Fourier transform functions
    polyfun    Polynomial and interpolation functions
    funfun     Function functions - nonlinear numerical methods
    sparfun    Sparse matrix functions
    plotxy     Two dimensional graphics
    plotxyz    Three dimensional functions
    graphics   General purpose graphics functions
    color      Color control and lighting model functions
    sounds     Sound processing functions
    strfun     Character string functions
    iofun      Low-level file I/O functions
    demos      Demonstrations and samples